Lock.



W. SNEATH.

LOCK.

APPLICATION FILED OCT. 12. 1915.

1,185,727. PatentedJune 6, 1916.

2 SHEETS-SHEET l.

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' w, SNEATH.

LOCK.

APPLICATION FILED cm. 12, 1915.

Patented June 6, 1916.

2 SHEETS-SHEET 2- 'IIIIIIII'IIA n R O T N E V INI WgNESSES I ATTORNEY i drawings, in which-- WILLIAM SNEATH, 0F PROVIDENCE, RHODE ISLAND.

LOCK.

To all whom it may concern Be it known that 1, WILLIAM SNEATII, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention has relation to certain new and useful improvements in looks, and has for its primary object, the provision of a lock which will be of such construction and operation as to make it impossible for an unauthorized party to open the same.

The invention has for another object, the provision of a lock of the above-stated character which will be of improved and simplified construction and operation and which will be provided with a plurality of spring locking members adapted to be drawn together by a special form of key to permit the bolt of the, lock to be withdrawn.

The invention hasfor another object, the provision of a lock of the above stated character which will be of such construction and operation that it may be opened by properly authorized parties with the proper key.

A further object of the invention resides in the provision of a key of the above-stated character which will be provided with a plurality of spring locking members arranged in pairs and carried by the bolt carrying head of the casing to automatically lock the latter in closed position and prevent withdrawal of the bolt.

With the above and other objects in view,

the invention resides in the novel construction, combination, and arrangement of parts as hereinafter set forth in the specification, pointed out in the claims, and shown in the Figure 1 is an elevation of the complete device with the bolt in operative position; Fig. 2 is a longitudinal sectionthrough the same; Fig. 3 is a bottom plan with the bottom plate removed; Fig. 4 is an elevation of Y [the bolt carrying head and parts mounted upon the same. Fig. 5 'is-an endelevation of the part shown in Fig. 4; Fig. 6 is a transverse section on the plane of line 66 of Fig. 4, looking in the direction indicated by the arrows; Fig. 7 is a transverse section through the casing; Fig. 8 is an end elevation of the casing with the bolt carryinghead removed; Fig. 9 is a detail view of the 7 preferred form of key. Referring more particularly to the draw.-

Specification of Letters Patent.

Patented June 6, 1916.

Application filed October 12, 1915. Serial No. 55,511.

ings in which similar reference characters designate corresponding parts throughout the several views, 1 designates the casing which has a cutout portion 2 in its upper side, and across which the bolt 3 extends when the latter is in operative position. The casing 1 has a stationary head 4 at one end to which is pivoted, by means of a central pivot pin 5, a turn plate 6 having a recess 7 to receive the tapered end 8 of the bolt 3 extended through the stationary end 4 of the casing 1, when the bolt 3 is in operative position, as shownin Fig. 2, thereby locking the turn plate 6 against movement in either direction.

The end walls 9 of the cut-out portion 2 I serve to guide the bolt. 8 in its movement to operative and inoperative position and the bolt 3 is secured by one end in the removable head 10 of the casing 1 and has a knob 11 formed upon its outer extremity.

The casing 1 has an open bottom with guide flanges 12 formed in its opposite longitudinal edges to receive the reduced longitudinal edges of the bottom slide plate. 13, against the opposite ends of which are engaged the lower edges of the stationary head 4 and removable head 10 of said casing 1, when said heads 4 and 10 are in normal position, therebypreventing sliding movement of the bottom slide plate 3 in' either direc' tion.

One end wall 9 of the cut-out portion 2 of said casing 1 is extended into the same to provide a transverse partition 14 provided with a central opening 15 which is preferably ofrectangular form and has. an auxiliary communicating opening 16'about the center of its upper edge. A guide plate 17 is also positioned in the bottom or lower part of the casing l and extends beneath the partition 14. The guide plate 17 is provided with a longitudinal guide slot. 18 which is enlarged, as shown at 19,, at the end of the casing to which the turn plate 6 is pivoted and reduced, as shown at 20, at its opposite end to provide the shoulders 21 for engagement by the shank 22 of a suitable key 23.

Secured to the removable head 10 is a supporting plate 24 which is suitably bifurcated to provide the parallel'supporting arms 25, to the upper and lower faces of which are secured the curved spring look ing arms 26 which have their free ends directed toward the removable head 10, the

lower spring locking arms 26 resting against the guide plate 17. The supporting plate 2% is also provided with a central supporting arm 27, to the lower face of which is secured the strip 28 which has a beveled end 29 normally engaging the lower edge of the opening 15 when the removable head 10 is in closed position.

To the opposite face or upper face .of the supporting arm 27 is secured one end of the spring latch arm 30 which has a lug 31 formed on its upper face and engaged against the inner face of the upper or main wall of the auxiliary opening 16 when the removable head 10 is in closed position to prevent said removable head 10 from being withdrawn. The free end of the spring latch arm 30 projects through a slot 32 in the removable head 10 and has a knob 33 mounted thereon, said knob 33 being normally at the upper end of the slot 32. It will also be understood that when the removable head 10 is in closed position, the free ends of the spring locking arms 26 are spaced from the partition 14:. When it is desired to open the lock and withdraw the bolt 3, however, it is simply necessary to hold the casing 1, press the knob 33 toward the bottom of the slot 32 to disengage the lug 31, and then draw the removable head 10' outwardly, withdrawing'the tapered end 8 of the bolt 3 from the recess 7. Movement of the removable head 10 in this direction will be limited by engagement of the free ends of the spring locking arm 26 with the inner face of the partition 14. The turn plate 6 should then be given a onefou-rth turn on the pivot pin 5 and the bottom slide plate 13 moved over the turn plate 6 to its outermost position, exposing the guide slot 18 for the key 23. The key 23' should then be inserted in the enlarged end 19 or entrance end of' the guide slot 18 until the bifurcated end 34; of said key 23 straddles the supporting arm 27 and parts carried by the same, and the supporting arms 25, together with the spring locking arms 26 rest in the pockets 35 provid'edfor the same in the opposite side edges of said key 23. The opposite side walls of the slot 18 are engaged in the pockets 36 above the pockets 35 to properly guide the key 23 in its movement along the guide slot 18 toward the stop: shoulder 21. Movement of the key in this direction will cause the spring locking arms 26 to be pressed against the supporting arms 25 and when the key 23 reaches the stop shoulders 21, the free ends of the spring locking arms 26 will be opposite the opening 15 in the partition 14 and the removable head 10 may be compl'etely withdrawn, together with the bolt 3.

It will be readily understood that when it is desired to again insert the bolt 3 and secure the same in operative position, the

above described operation may be reversed, leaving out the key. That is to say, the supporting arms 25 and 27 may be inserted in the opening 15 of the partition 14C and moved through the same until the supporting arms 25 and 27 and the parts carried thereby are in the position shown in Fig. 2, the bottom slide plate 13 having been previously moved to closed position and the turn plate 6 turned to lock the bottom slide plate 13 against outward movement. It will therefore be seen that the spring locking arms 26 will automatically move to the position shown in Fig. 2, while the lug 31 on the latch arm 30 will automatically snap to operative position and the tapered end 8 of the bolt 3 moves into the recess 7 of the turn plate 6, as clearly shown in the drawings, thereby securely locking the bolt 3 in operative position.

'lVhile the preferred embodiment of the invention has been shown and described, it will be understood that minor changes in the details of construction, and arrangement of parts may be resorted to withinvthe scope of the appended claims without departing from the spirit of the invention or sacrificing any of the advantages of the same.

What is claimed is:

1. A look comprising a casing, a turn plate at one end of said casing, a removable head at the opposite end of said casing, a bolt carried by said head and adapted for engagement with said turn plate, and a bottom slide plate for said casing.

2. A look comprising a casing having a removable head at one end and a turn plate at its opposite end, a bolt carried by said removable head and engaged in said turn plate to prevent movement of the latter, a bottom slide plate for said casing, said bottom slide plate being held in position by said turn plate, and means for locking said removable head in closed position.

3. A look comprising a casing having a transverse partition, a removable head for said casing, a bolt carried by said removable head, a turn plate held against movement by said bolt when the latter is in operative position, a slide plate held againstinovement by said turn plate, and means carried by said removable head for engagement with said partition to prevent withdrawal of said head from said casing.

4. A lock-comprising a casing having a cutout portion and a transverse partition, a removable head for said casing, a bolt carried by said removable head and extending across said cut-out portion, a turn plate for one end of said casing, one end of said bolt being engaged in said turn plate when said removable head is in closed position, a slide 'plate'for' said casing, said slide plate being held against movement by said turn plate member carried by said removable head and engaged With said partition to retain said bolt in normal position, and spring locking members carried by said removable head to prevent Withdrawal of said removable head.

5. A look comprising a casing, a turn plate at one end of said casing, a removable head for the opposite end of said casing, a bolt carried by said removable head and engaged with said turn plate, means for looking said removable head in engagement with said casing, and a slide plate for said casing to protect the 1ast-mentioned means.

6. A look comprising a casing, a remov- Gopies 0 this patent may be obtained for five cents each, by addressing the commissioner of Patents.

able head for said casing, a bolt carried by said removable head, said casing having an WILLIAM SNEATH.

Witnesses:

O. E. DRURY, NILs NELSON.

Washington, I). 0. 

